AR Lens Tracking Area Layout for See-Through Eye Tracking
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Solution Overview
Problem
Current augmented reality glasses struggle to accurately track user eye movements and display virtual objects seamlessly over real-world backgrounds, especially in terms of manufacturing complexity and visual obstruction during a powered-off state.
Innovation Solution
The design incorporates augmented reality glasses with left and right eye lens parts featuring a display area for virtual images and a tracking area with infrared light emission parts, including a base substrate, epitaxial growth type light emitting chips, and a filling member to enhance eye tracking and visibility of real objects, while reducing manufacturing difficulties and frame thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a head-mounted display is used to provide augmented reality services, then visual information of virtual objects can be displayed, but the user cannot visually recognize real objects when the device is powered off
Solution Approach 1:
The lens is divided into two distinct functional areas: a display area for showing augmented reality content and a tracking area for eye tracking sensors. This segmentation allows each area to perform its specific function without interfering with the other, enabling the display to be turned off while maintaining eye tracking capability.
Solution Approach 2:
Different regions of the lens are assigned different optical properties and functions. The display area is optimized for showing virtual images, while the tracking area is optimized for infrared light transmission and sensing. This local differentiation resolves the contradiction by allowing the display to be opaque when off (for eye tracking) while the display area remains transparent for viewing real objects.
2Ease of operation
If eye tracking functionality is added to the augmented reality glasses, then user interaction can be improved, but the manufacturing complexity increases
Solution Approach 1:
The eye tracking sensors are integrated directly into the lens structure itself, merging the tracking functionality with the existing optical component. This eliminates the need for separate tracking devices and reduces overall system complexity, as the lens serves dual purposes: displaying augmented reality content and performing eye tracking.
Solution Approach 2:
The lens is designed to perform multiple functions: displaying augmented reality images, enabling eye tracking, and allowing users to see real objects. By making the lens multi-functional, the invention reduces the need for additional separate components, thereby simplifying manufacturing despite adding advanced capabilities.
3Length of stationary object
If the frame thickness is reduced for better comfort, then wearability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The eye tracking sensors and display components are nested within the lens structure itself, which is already integrated into the frame. This nested arrangement allows for compact design with reduced thickness, as components are arranged in layers rather than requiring additional lateral space that would increase frame thickness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves eye tracking accuracy and allows users to see both virtual and real-world objects simultaneously, with reduced manufacturing complexity and frame thickness, enabling a more integrated and user-friendly augmented reality experience.
Implementation Method 1
a light emitting chip disposed on the base substrate
Implementation Method 2
light emission parts to emit light having a wavelength in an infrared band
Implementation Method 3
a waveguide disposed between the first optical lens and the second optical lens
Implementation Method 4
a first optical lens; a second optical lens including a recess area at one surface thereof
Data Source
AI summary
Augmented reality glasses include a left eye lens part and a right eye lens part, each of the left eye lens part and the right eye lens part having a display area configured to display an augmented reality image, and a tracking area surrounding the display area, the tracking area including a plurality of light emission parts configured to emit light having a wavelength in an infrared band, and a frame including a left eye lens support area, a right eye lens support area, and a nose bridge connecting the left lens support area and the right lens support area, the left eye lens support area supporting the left eye lens part, and the right eye lens support area supporting the right eye lens part.